3735681 has 4 divisors (see below), whose sum is σ = 4980912. Its totient is φ = 2490452.

The previous prime is 3735679. The next prime is 3735709. The reversal of 3735681 is 1865373.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3735681 - 2¹ = 3735679 is a prime.

It is a super-2 number, since 2×3735681² = 27910625067522, which contains 22 as substring.

It is a D-number.

3735681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3735601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622611 + ... + 622616.

It is an arithmetic number, because the mean of its divisors is an integer number (1245228).

Almost surely, 2^3735681 is an apocalyptic number.

It is an amenable number.

3735681 is a deficient number, since it is larger than the sum of its proper divisors (1245231).

3735681 is a wasteful number, since it uses less digits than its factorization.

3735681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245230.

The product of its digits is 15120, while the sum is 33.

The square root of 3735681 is about 1932.7909871479. The cubic root of 3735681 is about 155.1636287968.

The spelling of 3735681 in words is "three million, seven hundred thirty-five thousand, six hundred eighty-one".